Description_x000D_ General description_x000D_ Avidin is homotetrameric protein (68kDa) that is obtained from egg whites. This egg protein binds strongly to biotin. Thus, avidin-biotin association has been utilized in immunoassays to detect the localization of antigens in tissues. The use of avidin-biotin immunoassay enhances the sensitivity of the technique and facilitates the detection of antigens in low quantities._x000D_ Application_x000D_ Avidin-FITC from egg white has been used for immunohistochemistry applications._x000D_ To determine the amount of labeled polyclonal IgG present in spores in an IgG prep. A known concentration of FITC avidin from egg white and biotin-IgG avidin was used in excess at 300nm._x000D_ Packaging_x000D_ Package size based on protein content_x000D_ Physical form_x000D_ Contains sodium citrate_x000D_ Disclaimer_x000D_ Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.